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https://issues.apache.org/jira/browse/HBASE-11544?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack updated HBASE-11544:
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Attachment: mean.png
hits.j.png
gc.j.png
net.j.png
Here's some pictures. I ran three profiles:
# Current branch-1.0
# Branch-1.0 with the 1.0 patch from here
# Above but I set configuration so size was such that maybe 10-20% of the
returns required partials.
Dataset was 100M rows of ten columns zipfian sized between 0 and 8k. Avg row
size somewhere between 160 and 220.
For each set up, did two tests: one with many clients and one with just two
clients.
Looks like patch doesn't change general profile. With config in place, a bit
more GC probably because a bit more work was done -- extra rpcs -- but hit rate
seems a bit higher... more throughput. One odd thing is that the mean time
seems to have gone up a little when partials going on.
Patch looking good. Let me commit tomorrow. I suppose its fine to start w/ 2MB
as default size.
Need a release note [~jonathan.lawlor]
> [Ergonomics] hbase.client.scanner.caching is dogged and will try to return
> batch even if it means OOME
> ------------------------------------------------------------------------------------------------------
>
> Key: HBASE-11544
> URL: https://issues.apache.org/jira/browse/HBASE-11544
> Project: HBase
> Issue Type: Bug
> Reporter: stack
> Assignee: Jonathan Lawlor
> Priority: Critical
> Labels: beginner
> Attachments: HBASE-11544-branch_1_0-v1.patch,
> HBASE-11544-branch_1_0-v2.patch, HBASE-11544-v1.patch, HBASE-11544-v2.patch,
> HBASE-11544-v3.patch, HBASE-11544-v4.patch, HBASE-11544-v5.patch,
> HBASE-11544-v6.patch, HBASE-11544-v6.patch, HBASE-11544-v6.patch, gc.j.png,
> hits.j.png, mean.png, net.j.png
>
>
> Running some tests, I set hbase.client.scanner.caching=1000. Dataset has
> large cells. I kept OOME'ing.
> Serverside, we should measure how much we've accumulated and return to the
> client whatever we've gathered once we pass out a certain size threshold
> rather than keep accumulating till we OOME.
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